16 Feb
2014
16 Feb
'14
11:18 p.m.
From: Ethan Dicks: Sunday, February 16, 2014 2:16 PM
On Sun, Feb 16, 2014 at 4:14 PM, Charles wrote:
My copy of the EOML for 1991 shows M8549 (no suffix) as
"Universal Substitute Board, 4 layer hex", and indicates it is
indeed for the KL10.
In addition, several variants are listed:
-YA Channel Control Substitute
-YB Channel Control Word Substitute
-YC Channel RAM Control Substitute
-YD Channel Control Logic Substitute
-YE Cache Address Substitute
-YF Cache Extension Substitute
-YH Cache Data Substitute
All are for the KL10.
Hope that helps.
Vince
I have a hex-height (Omnibus) board in my junk
box... M8549 "Universal
Substitute Board". It has a few 10101 (ECL??) IC's. Here is a picture
of both sides.
http://s1181.photobucket.com/user/DrCharlesMorris/library/PDP-8
Anyone know what this is for, and any schematic info? I can't find it
on any module list.
ECL makes me think "PDP-10". The fact that it has signals on the
"F"
finger tells me that it's not an OMNIBUS board - those use A-D for the
OMNIBUS itself, and memory cards/memory controllers can use the "E"
finger for the extra address lines. Nothing in a PDP-8 uses "F".
I don't have an exhaustive card list handy, but see what else shares
the M85xx range. Related boards often have sequential or
nearly-sequential handle numbers.